891314689 has 2 divisors, whose sum is σ = 891314690. Its totient is φ = 891314688.

The previous prime is 891314663. The next prime is 891314693. The reversal of 891314689 is 986413198.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586463089 + 304851600 = 24217^2 + 17460^2 .

It is a cyclic number.

It is not a de Polignac number, because 891314689 - 2¹³ = 891306497 is a prime.

It is not a weakly prime, because it can be changed into another prime (891314609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445657344 + 445657345.

It is an arithmetic number, because the mean of its divisors is an integer number (445657345).

Almost surely, 2^891314689 is an apocalyptic number.

It is an amenable number.

891314689 is a deficient number, since it is larger than the sum of its proper divisors (1).

891314689 is an equidigital number, since it uses as much as digits as its factorization.

891314689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 49.

The square root of 891314689 is about 29854.8938869325. The cubic root of 891314689 is about 962.3735713850.

The spelling of 891314689 in words is "eight hundred ninety-one million, three hundred fourteen thousand, six hundred eighty-nine".